package com.bigmi.admin.gateway.filter;

import com.bigmi.admin.gateway.utils.AdminJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
@Slf4j
public class AdminFilter implements Ordered, GlobalFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //获取request和respond
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        //判断是否登录
        System.out.println(request.getURI());
        if (request.getURI().getPath().contains("/login")){
            //放行
            return chain.filter(exchange);

        }
        //获取token
        String token = request.getHeaders().getFirst("token");

        if (StringUtils.isBlank(token)){
            //token不从在返回401
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            //结束请求
            return response.setComplete();
        }
        //判断token是否有效
        Claims claimsBody = AdminJwtUtil.getClaimsBody(token);
        //是否过期
        int results = AdminJwtUtil.verifyToken(claimsBody);

        try {
            if (results==1 || results==2){
                //token过期返回401
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                //结束请求
                return response.setComplete();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        //放行
        return chain.filter(exchange);
    }
    //优先级设置
    @Override
    public int getOrder() {
        return 0;
    }
}
